When performing a grid refresh, the grid re-renders the all the grid rows. I think it would be very efficient to have a choice to render specific, changed rows. This is valuable if the grid has many items (200 items for example).
I support this idea. On the grid's data-binding event, we are now calling "preventDefault" for "itemchange" events so we can run our own logic to just modify the value of changed cells. It would be better though if the grid did that itself.